While appearing on "Piers Morgan Tonight," Cameron launched a vicious attack against homosexuality.

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Former child star Kirk Cameron made shocking remarks during a visit to "Piers Morgan Tonight."

Sometimes, asking "Hey, whatever happened to that guy?" is a question better left unanswered.

Former child star Kirk Cameron, who became a Tiger Beat pin-up playing Mike Seaver on the long-running ABC sitcom "Growing Pains" from 1985 to 1992 , has become a Christian evangelist and star of several straight-to-video, Rapture-themed movies known as the "Left Behind" series.

On Friday night, during an interview on "Piers Morgan Tonight," Cameron unleashed a vicious attack on homosexuality.

"I think that it's unnatural. I think that it's detrimental, and ultimately destructive to so many of the foundations of civilization," said the now 41-year-old actor.

"Marriage is almost as old as dirt, and it was defined in the Garden between Adam and Eve," he continued. "One man, one woman for life till death do you part. So I would never attempt to try to redefine marriage. And I don't think anyone else should either."

Cameron even claimed he wouldn't accept it if one of his six children were to come out as gay.

"I wouldn't say 'That's great, son, as long as you're happy.' I'm going to say, 'There are all sorts of issues we need to wrestle through in our life. Just because you feel one way doesn't mean we should act on everything we feel'."

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"Cameron is out of step with a growing majority of Americans, said Herndon Graddick, the Senior Director of Programs at GLAAD. "With an increasing number of states recognizing marriage equality, Americans are seeing that marriage is about committed couples who want to make a lifelong promise to take care of and be responsible for each other and that gay and lesbian couples need equal security and legal protections. That's not 'redefining' anything."

"In this interview, Kirk Cameron sounds even more dated than his 1980s TV character," sniped Graddick.